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<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"
xmlns:atom="http://www.w3.org/2005/Atom"
xmlns="http://www.w3.org/1999/xhtml">
<!-- only retain titles that don't duplicate summary or content -->
<xsl:template match="atom:title">
<xsl:copy>
<xsl:if test="string-length(.) &lt; 30 or
( substring(.,1,string-length(.)-3) !=
substring(../atom:content,1,string-length(.)-3) and
substring(.,1,string-length(.)-3) !=
substring(../atom:summary,1,string-length(.)-3) )">
<xsl:apply-templates select="@*|node()"/>
</xsl:if>
</xsl:copy>
</xsl:template>
<!-- pass through everything else -->
<xsl:template match="@*|node()">
<xsl:copy>
<xsl:apply-templates select="@*|node()"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>